class Animal:
  name='animal'
  def shout(self):
      print('animal shout')

animal=Animal()
print(animal.name)
animal.shout()

class Dog:
    name='dog'
    def __init__(self):
        self.age=10

    def eat(self):
        print('dog eat')

dog=Dog()
print(dog.name)
dog.eat()

dog1=Dog()
print(dog1.name)
print(dog.name)
dog1.name='dddd1'
print(dog1.name)
print(dog.name)

Dog.name='dd'
print(dog1.name)
print(Dog.name)
print('----------------')
dog2=Dog()
print(dog2.name)
print(dog2.age)